LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT)Controllers Installation Instructions1ApplicationThe LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) controller line is designed to control various types of Heating, Ventilating, and Air Conditioning (HVAC) equipment such as baseboards; duct heaters; multi-stage heaters; and fans, coolers, valves, and lights.The controllers are based on LONWORKS® technology for peer-to-peer communication between controllers and are LONMARK® network certified.North American Emissions ComplianceUnited StatesCanadaInstallationFor proper installation and subsequent operation of the LX-VAV/VVT controller, follow these recommendations:•Upon unpacking your controller, inspect the contents of the carton for shipping damage. Do not install damaged devices.•Allow for proper clearance of device casing, wiring terminals, and service pin for easy access, hardware configuration, and maintenance. Record the Neuron® ID located on top of the device. You need it for commissioning the device.•The controllers are designed to operate under the following conditions:•Ambient temperature between 32 to 158°F (0 to 70°C)•Relative humidity from 0 to 90%, noncondensing•Ensure proper ventilation of devices and avoid areas where corroding, deteriorating, or explosive vapors, fumes, or gasses may be present. Compliance Statement (Part 15.19)This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:1.This device may not cause harmful interference, and2.This device must accept any interference received, including interference that may cause undesired operation.Warning (Part 15.21)Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.Industry Canada StatementLe terme « IC » précédant le numéro d'accréditation/inscription signifie simplement que le produit est conforme aux spécifications techniques d'Industry Canada.IMPORTANT:Work in a static-free area. Discharge any accumulated static electricity. Discharge static electricity by touching a known, securely grounded object. Do not handle the controller without proper protection against static discharge. Use a wrist strap when handling the controller. Secure the wrist strap clamp to earth ground.IMPORTANT:Before you install your wireless controller, verify the local communication regulations allow the installation of wireless devices that operate at a frequency of 868.3Mhz.LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) ControllersInstallation InstructionsLX-VAVLF-1, LX-VAVLN-1, LX-VVTLF-1, LX-VAVCF-1Code No. LIT-12011503Issued April 28, 2014Supersedes June 22, 2009LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions2 Dimensions Figure 1: LX-VAVLF, LX-VAVCF, and LX-VVTLF Controller DimensionsLow pressureHigh pressureBracket mouting kit190 [7.48 ]54 [2.13 ]61.5 [2.42]10 [0.40]3 mm0.12 in26.5 [1.04]11 [0.43] 5 [0.2] Units Legend: mm [inches]Figure 2: LX-VAVLN Controller DimensionsFigure 3: Controller ComponentsLX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions 3MountingLocation ConsiderationsThe LX-VAV/VVT controllers are to easy install. The integrated mounting brackets on each controller have a diameter of 0.2 in. (5 mm) and are designed to oppose the shaft torque. Mount the controller directly on an air duct or in a panel by suing the integrated mounting brackets and screws provided.Note:Units with a damper actuator only have one screw.3.Remove the terminal blocks and use the controller mounting slots to mark the location of any holes to drill.4.Remove the device and drill holes.5.Clean the perforated surface and fasten the device using the appropriate screw types.6.Ensure the damper shaft is at least 1.5 in. (40 mm) to allow the damper bracket to fit securely around the damper shaft. If required, limit the maximum damper shaft rotation by modifying the position of the stroke end-stops in 5° increments.Note:To connect the high and low pressure sensors, see Figure 3, use flexible tubes with 1/4 in. (6.4 mm) outside diameter and 5/32 in. (4 mm) inside diameter.Wiring Recommendations:•Use the removable terminal connectors to make all wiring connections.•Disconnect the terminal connectors from the device for wiring. •Use a small flat screwdriver to tighten the terminal connector screws once you have inserted the wires.•Keep analog type cables (for power, voltage, current inputs, or triac outputs) apart from other types of wiring to avoid any ambient noise transmission among wires; however, unswitched power wiring can be in the same conduit as the LONWORKS communication cable.The board connectors accept wires or flat cables ranging from 22 to 12 AWG (0.645 - 2.052 mm diameter) per pole; however, power cables must remain between 18 and 14 AWG (1.024 - 1.628 mm diameter).Note:The transformer powering the controller must be configured as a floating transformer. Do not ground the transformer.Power WiringDevice power requirements: 24 VAC +/- 15%, Class 2Note:To conform to Class 2 requirements in the United States, use transformers of 100 VA or less to power the controller.min. 40 mm (1.5")Figure 4: Mounting a VAV or VVT Device on a Damper ShaftIMPORTANT:Make all wiring connections in accordance with the National Electrical Code and all local regulations. User copper conductors only. Do not exceed the control’s electrical rating.!CAUTION: Risk of Electric Shock.Disconnect power supply before making electrical connections to avoid electric shock.MISE EN GARDE : Risque de décharge électrique.Débrancher l'alimentation avant de réaliser tout raccordement électrique afin d'éviter tout risque de décharge électrique.IMPORTANT:Do not connect the analog/digital inputs or common terminals to ground (only if otherwise stated).LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions4If powering more than one device, use the following method to calculate the power requirements of the required transformer:1.Add up the maximum power consumption of all devices and multiply this sum by 1.3.2.If the resulting number is higher than 100 VA consider using multiple transformers.Use an external fuse on the 24 VAC side (secondary side) of the transformer to protect all devices against power line spikes (Figure5).Maintain consistent polarity when connecting controllers and devices to the transformer. Connect the COM of each controller and each peripheral to the same terminal on the secondary side of the transformer. We recommend wiring only one controller per 24 VAC transformer.If only one 24 VAC transformer is available, wire no more than five controllers with the total wire length less than 200 feet. If you are powering between five and ten controllers with one 24 VAC transformer, consider the following two options:•wire the controllers in a closed loop topology (total wire length less than 400 feet). Wire the last controller back to the power supply transformer.•wire the controllers in a star topology having no more than five controllers on each bus (with a total wire length less than 200 feet/bus).Note:The VAV/VVT controllers are half wave rectified. Connecting two half wave power supplies to the same transformer without maintaining polarity causes a short circuit. The controller uses 24 VAC +/- 15%. Input WiringThe VAV/VVT controller inputs are software configurable from within the device wizard. Each input can be configured for digital, resistive, current or voltage signals. You must configure the input types properly in the software wizard to ensure proper input readings.For a wire length less than 75 ft (23m) use either a shielded or unshielded 18 AWG wire.For a wire length less up to 200 ft (61m) use a shielded 18 AWG wire.The wire should be shielded on the controller side and the keep the shield length as short as possible.Wiring Digital InputsThis input configuration is used to monitor digital dry contracts as well as 10k ohmsNTC thermistors. IMPORTANT:The COM terminals of the controller are internally wired to the 24 V COM terminal of the power supply. Therefore, if powering peripherals and controllers with the same transformer, it is essential to maintain polarity. Failure to do so results in a short circuit and/or a damaged device. The transformer must be floating not grounded.Figure 5: Power WiringFigure 6: Digital Dry Contact (NO and NC)UIxCOMDigital Dry ContactNO-NCLX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions 5Wiring Resistive InputsUse this input configuration to monitor 100 ohm and 1000 ohm RTDs, 10 k ohm Type II and Type III thermistors, as well as 10 k ohm potentiometers.Wiring Current InputsCurrent inputs can have a range of 4 to 20 mA. Connect the current input if the transducer is externally powered. Use a transducer with 2-wire, 4-20 mA. See Figure8. Connect the current input if the transducer is powered by its own power source. See Figure9. Wiring Voltage InputsVoltage inputs have a range of 0 to 10 VDC, with +/- 0.5% accuracy. Connect the voltage input according to Figure10. Connect the voltage input according to Figure11 if the transducer is powered by its own power source.Output WiringThe LX VAV/VVT controllers have physical connections for either digital or universal outputs depending on the controller model. The digital outputs are all hardware configurable and must be configured by changing the jumper settings on the printed circuit board.Wiring Digital OutputsYou can configure the digital outputs as either powered outputs or non-powered outputs. When wiring digital outputs:•the non-powered output type does not have any voltage on the output terminals when the output is active. Power must be supplied externally.•the powered output type has 24 VAC on the output terminals when the output is active. Power is therefore supplied internally by the controller.Note:The LX VAV/VVT controllers are shipped with all digital outputs configured as powered outputs. Maximum output current for all digital outputs (powered or non-powered) is 1 A.DO1 and DO2 are controlled by a single jumper and must be set identically. Similarly, DO3 and D04 are controlled by a single jumper and must be set identically. The jumpers specify whether an internal or external power source is being used. The C terminal between DO1 and DO2 is common to DO1 and DO2 only. Similarly, the C terminal between DO3 and DO4 is common to DO3 and DO4 only.UIxCOMRTD/Thermistor Figure 7: RTD/Thermistor InputFigure 8: Current Input with External Power SourceFigure 9: Current Input with Internal Power SourceFigure 10: Voltage InputFigure 11: Voltage InputUIxCOM0-10VTransducer+-LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions6Note:You must connect an external load to measure the state of a digital output (TRIAC). See Figure12 and Figure13.When you control an external floating actuator, wire the controller to the actuator (Figure13).Wiring Universal OutputsConfigure universal outputs to provide either a linear signal ranging from 0 to 10 VDC or a discrete signal of 0 or 12 VDC. The discrete signal can be used to generate a Pulse Wave Modulation (PWM) signal or a simple two-state signal. The outputs are protected by an auto-reset fuse. The maximum current rating of this output is 20mA at 12 VDC with a total maximum load of 600ohmWhen you drive a relay with a universal output, a diode must be connected in parallel to protect the controller from back-emf, current which occurs when the relay is turned off. It is recommended to use diodes that are part of the 1N4004x family. When controlling an external analog actuator, wire the controller to the actuator (Figure15 and Figure16).Note:You can connect either an AO1 or AO2 to the + input of the actuator. Communications WiringApproved cable types for LONWORKS communications are Level IV 22 AWG (0.65 mm), UNSHIELDED. You can use both one pair and two pair wires. The LONWORKS communication wire is polarity insensitive, and can be laid out in a bus, star, loop, or free topology.Note:The Bus topology network configuration allow for easy network troubleshooting for LONWORKS communication wiring. RelayCDOA2A1AC24 VACCOMExternal power sourceJumper SettingsJumper SettingsFigure 12: Digital Output with External Power Supply CDO1A @ 24VACMax. current: Internal power sourceJumper SettingsFigure 13: Digital Output with External Power Supply Internal power source CDO2DO1T~~(24 VAC)ActuatorFloatingFigure 14: 0 to 10 VDC Analog OutputFigure 15: 0 or 12 VDC Discrete Output 24 VAC~COMTGNDAO1AO2Analog+(0-10V)ActuatorFigure 16: Connecting to an External Analog ActuatorLX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions 7Connect both wires to the LONWORKS terminals of the controller. If you are inserting multiple wires in the terminals, make sure to properly twist wires together prior to inserting them in the terminal connectors (Figure17). For additional information and detailed explanations on network topology and wire length restrictions, refer to the Echelon® Junction Box and Wiring Guideline for Twisted Pair LONWORKS Networks (Part No. 005-0023-01).Note:Use proper network terminators depending on the type of network topology used. Failure to do so may result in communication errors between controllers. Do not use multiple gauges of cable on the same communication bus, as this may also result in communication errors.Selecting Network TerminatorsFor bus topology, two network terminators are required (one at each end of the bus topology channel). For a free topology, one network terminator is required. You can put it anywhere on the channel.LN-VSTAT Sensor for VAV WiringThe LX-VAVLF-1 and LX-VVTLF-1 controllers are compatible with the LN Sensor line of standard room sensors. Refer to the LN-VSTAT and LN-PSTAT Installation Instructions (LIT-12011302).Networking GuideTo commission a device and add it to a LONWORKS network, you need to use the device wizard as well as the .xif and .nxe files. To obtain the files:Note:These commissioning steps only apply when you are using FX Workbench software.1.Locate the desired configuration setup.exe file on the FX Workbench Installation CD.2.Run the installation setup to install the device wizard and latest version of the .xif and .nxe files. The .xif and .nxe files install in the C:\LONWORKS\Import\JCI LX folder.3.Add and commission the device with FX Workbench. Neuron ID and Service PinTo commission a device and add it to a LONWORKS network, you need the Neuron ID of the device. To obtain the Neuron ID:•manual entry: the Neuron ID address and bar code ar local on a sticker on the device.•service pin: pressing the service pin on the device broadcasts the Neuron ID on the LONWORKS network.E-Blank JumperThe LX VAV/VVT controllers feature an E-Blank jumper which can be used to erase the Neuron chip. If you load an incorrect .nxe file into the controller, the Neuron chip’s memory becomes corrupt. Use the E-blank jumper to correct the problem by returning the chip to an application-less state. The E-Blank jumper is labelled J22 on the PCB board.To erase the Neuron chip’s memory using the E-Blank jumper:1.Disconnect the power to the controller.2.Place a jumper on the pins labelled J22 on the board (Figure18).3.Reconnect power to the controller. The amber colored service Light-Emitting Diode (LED) blinks rapidly, indicating that it is erasing the Neuron chip’s memory. When the light becomes solid (and stops blinking), the erase procedure is complete.Figure 17: Communications WIringLX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions84.Disconnect the power to the controller and remove the jumper.5.Reconnect the power. The service LED blinks twice and becomes solid indicating the controller is application-less.6.Load the proper .xif and .nxe files into the controller. Note:If the device already exists in the Facility Explorer database, you must use the AppDownload button in FX Workbench to download the .xif and .nxe files.TroubleshootingFigure 18: E-Blank Jumper (J22) LocationIMPORTANT:Downloading an improper .nxe file into the device may damage the Neuron® chip in your controller. The controller may become unusable.Table 1: Troubleshooting (Part 1 of 3)ProblemPossible CauseSolutionDevice is powered but does not turn on.Fuse is blown.Check the fuse integrity; also ensure the green power LED next to the service pin is on.Power supply polarityVerify consistent polarity is maintained between all controllers and the transformer.Device cannot communicate on a FTT network.Absent or incorrect supply voltageCheck power supply voltage between 24 VAC and COM pins to ensure it is within acceptable limits. Check for a tripped fuse or circuit breaker.Overloaded power transformerVerify the transformer used is powerful enough to supply all controlled devices.Network not wired propertyDouble-check the wire connections are correct.Absent or incorrect network terminatorsCheck the network terminators.LX Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions 9Device communicates well over a short network but does not communicate on a large network.Network lengthCheck that the total wire length does not exceed the specifications of the FTT User’s Guide.Wire typeCheck that the wire type agrees with the specification of the FTT User’s Guide. Verify your wire is UNSHIELDED.Network wiring problemVerify the wire connections are correct.Absent or incorrect network terminatorsCheck the network terminators. Incorrect or broken terminators make the communication integrity dependent upon a device’s location on the network.Extra capacitanceVerify that no extra capacitances are connected to the network other than the standard FTT circuit, and a maximum of 3 meter stub (in bus topology).Number of devices on network segment exceededThe number of devices on a channel should never exceed 64. Use a router or a repeater in accordance to the FTT User’s Guide.Network trafficQuery node statistics to check for errors. Use a LON protocol analyzer to check network traffic.Hardware Input is not reading the correct value.Input wiring problemCheck that the wiring is correct according to this manual and according to the peripheral device’s manufacturer.Open circuit or short circuitUsing a voltmeter, check the voltage on the input terminal. Short circuit (0 V) and open circuit (10 V).Configuration problemUsing a device configuration wizard, check the configuration of the input. Refer to the device’s user guide for additional information.Hardware output is not operating correctly.Output wiring problemCheck that the wiring is correct according to this manual and according to the peripheral device’s manufacturer.Configuration problemUsing the device configuration wizard, check the configuration of the output. Refer to the device user’s guide for more information.0-10 V output, 24 VAC powered actuator is not movingCheck the polarity of the 24 VAC power supply connected to the actuator while connect to the device. Reverse the 24 VAC wire if necessary. Check the jumper setting for the external power supply as shown in Figure13.Wireless devices are not working properly.Device is not associated to controllerUsing the device configuration wizard, check the configuration of the output. Power dischargeTo check power discharge:1.Recharge device with light (if solar-powered) or replace the battery.2.Ensure sufficient light intensity (150lx for 3 to 4 hours a day).Device is too far away from controllerReposition the device to be within the range of the controller. Configuration ProblemUsing the device configuration wizard, check the configuration of the output.Table 1: Troubleshooting (Part 2 of 3)ProblemPossible CauseSolutionNext >